What is the difference between rigid and flexible printed circuit board design?
This class is different from the former class is a layer of the surface layer. But the cover has a vias, but also allows both sides can be terminated, and still maintain the cover. This type of soft PCB is made of two layers of insulating material and a layer of metal conductor. Is used in the need to cover and the surrounding devices are insulated from each other, but also have their own insulation, the end of the need for positive and negative are connected to the occasion.
This type of connection plate interface can be connected to the front and back of the wire. In order to do this, a vias are formed on the insulating substrate at the pad, which can be first punched, etched, or otherwise mechanically machined at the desired location of the insulating substrate. It is used for both sides of the installation of components, devices and the need for soldering occasions, the road area without insulating substrate pad, such pad area is usually removed by chemical method.
This class compared with the former class, only in accordance with customer requirements in the wire surface more than a layer of cover. Cover the need to cover the exposed, simply can not cover the end of the area. Requires precision can be used in the form of clearance. It is single-sided soft PCB in the most widely used, the most widely used in automotive instrumentation, electronic equipment.
no cover layer single-sided connection
Single-sided soft PCB, only a layer of conductor, the surface can have a cover or no cover. The insulating base material used varies depending on the application of the product. Commonly used insulating materials are polyester, polyimide, polytetrafluoroethylene, soft epoxy - glass cloth and so on.
